At this point I rate Roddick just above Murray, due to his ranking achievements (reached No 1, nine years in top ten). However they are pretty close.

Murray: 4.5 years in the top 5, reached as high as #2, has spent the majority of his career ranked at #4, and has had a very consistent career.

Roddick: 3 years as a top five player, reached #1, spent the majority of his career ranked 2-7, has come close to winning Wimbledon a few times, has fallen out of the top ten at some point after achieving the #1 ranking (2006 at #12).